This occurs when "there is deceleration action, but after deceleration the axis continues running at low speed and eventually generates a 90# alarm". The problem is typically that the system is failing to find the encoder's zero mark after switch deactivation.
Guess the reference point, set it blindly, and crash the turret into the chuck.
If the machine uses absolute encoders (no dog required), parameters 508 & 509 store the master reference position.